Grinding-mill.



0. N. MQLAUGHLIN.

GRINDING MILL. APPLICATION FILED JULY 6,1908.

Patented Feb. 2, 1909.

2 SHEETS-BEBE! 1.

G. N. MOLAUGHLIN.

' GRINDING MILL.

APPLICATION FILED JULY 6,1908.

Patented Feb. 2, 1909.

2' sums-5mm 2.

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CUNNlNGllAM N. MCLAUGHLIX, OF \JINONA, M

FACTURING COMPANY. OF WINONA, MIN\ PATEN T OFFICE.

GRINDING-MILL.

No. 91 1,061. Specification of Letters Patent. Patented Feb. 2, 1909.

Application filed July 6, 1908. Serial No. 442,049

To all whom it may concern:

Be it known that I, CUNNmonAn N. 3h-

LAUGIILIN, eitizen of the United States, re-

siding at inona, in the county of Wilton: and State of Minnesota, have invented eertein new and useful Improvements in Grind- 3 ing-Illills, ol' whieh the following is a speeiiication.

My invention relates to certain new and useful improvements in mills adapted to grind groin, seeds, spices, drugs and the like. and the object of my present invention is to improve and simplify the construction thereof, to make the some more durable and elli (:ient, nnd to eeeomplish these ends with a retina-ed most of nninul'aeture.

My iml'irovements particularly relate to the type of grinding mills shown and dosrrihed in Letters Patent granted to me Septemher l, Wot), No. 737,953, and l ebrunrv U, toes, No. 511,945, and are specifically designed For this type of machine. It is to he under tood however that my lIYIPI'OVBIINEIlt-s may be npplied to other forms of mills, end that I do not limit myself to their use in conneetion with these machines, but that it. may be applied to any form of eonstrut-tion where found desire blo.

My invei in vonsists in eertitin construe tions. MlHllJliJf-ltltlltH und arrangements ol isrts the preferred form of which will be lirst doseribod in connection with the accompanying; drawings and then. the invention partiruhniy pointed out in the claims.

Referring to the drawings wherein. the

same part is designated by the same reference numeral wherever it occurs, Figure l is a. perspeetive View ol a mill built in :n-rordsure with my invention: Fig. 2 is n. eentritl longitudinal section thereof; lhlkf. I) is it seetion of :1 portion ol the bur sepemtin; meehautism, and l ig lis n. perspeetive View of a. portion of the some :neelntnism.

In the drawings, 1 designates the frame, 2 the shnlt mounted in bearings 3, "t, the shalt liming; lost. on its end beyond the bearing: 3, l the :irn inupulley 5. l

t; is the hopper scoured to the top of the frnine and 7 is a sliding valve for controlling the How of the nmteriel to be ground from the hopper. The valve 7 is in the form of'e plate and is adjustehly held in the bracket 8 y the bolt 9 which passes through a slot in the valve.

10 is an inclined spout extending under the t mouth of the hopper to rnteh the material as it issues therefrom. the spout lzeing pivoted at its upper end on the boil it depending: 3 from the projer-tion 12 of the frame, the belt pa sing loosely through the opening 15 in the end of the spout.

ll is n spring interposed between the upper snrl'zu-e of the s out and the lower surfzn-e of the projer-tion 12, the spring surrounding the bolt H, when-l the spout is capable ol being shaken to ennse an even feed of the nmteriol to be ground.

Serurod to the under side of the spout. It) is a on nrm 14' \\'lll('ll extends downwardly end nt l its lower end is formed into at l'ork l5 whn'h l straddles :1 ram It), first on the shaft 2,

whereby the s tout is shaken.

l? is :1 sproeliet whieh is set-tired to one end ot the mm l6, and which may not to drive an elevnt'or or other .tttovhment by being, eonneeted thereto by a elmin not howevershown.

In is a. housing: having; an opening in its upper portion into whieh the lower end of the spout It] projeets. The shaft 2 extends through the ower portion of the housing and on the outer side of the housing and surrounding the shaft the stationary bur It) is sernred.

2U the feed screw earried on the shalt :tnd extending into the housing IS. On the tlnnge 21 of the feed serew is secured the movttl)ltt bur 22, adapted to eooperete with the stationary hur19 and grind the material led between them by the feed screw.

23 is the housing for the burs, end it is 0 011. at the bottom whereby the material alter passing; through the burs will he delivered troln the machine.

The shalt 2 at its end beyond the burs is provided with e redueed end 24 that is inserted into central openings in e ntir of disks .25 between which is a series of balls 26, the dislts extending into it depression in the side of u. easing 27, whieh terms on oil well for the blurring: thus formed, the disks being shown as supplied with it chain 45, by means of which the bearing is kept thoroughly lubricated. The casing 27 is provided on its burl-1 With a depression which is engiwed by it projeetion 28 formed on the eentre portion of a oke 29 slidahly mounted on the rods 30 adustebly mounted on the frame.

31 are the coil-springs mounted on the rods 30 and extending between the ends of the yoke and the hand wheels 32 threaded on the ends of the rods by means of which the tension of the springs can be adjusted. These s rings operate through the yoke to force t re shalt longitudinally and the movable bur against the fixed bur.

In order to throw the movable bur out of rent-act with the iixed bur quickly and read ily I prm ill! a lever 33 having a central openin; through which the shaft loosely passes and so )poited :it its lower end in the step 34 on the with of the casin The up or end of the lever is prel'erahly l'orked, out in the fork is pivotully mounted, the cam lever 35 having the handle portion 36 and the (urn nose It? a hit-h is adapted to bear against the bark ol the casing 23, so that when the hondle is depressed to the position shown in Fig. 1 it will operate to cause the lever .33 tol'oioe the lasing '27 away lrom tho rasnm 33. In

order to move the shaft longitudinally when bearing: f r said shaft, a siring bearmp on the lever is operated as just deserihed, l loosely mount on the shaft just inside the bear-in 3 the cup shaped disk 38 which pieL erahly has the projecting grooved lugs 31) with which a projection 40 on the inner surface of the bearing 3 engages to hold said dish from rotating with the shaft.

it is ll coil spring surrounding the shaft and secured at one end to the inside of the dish 35. The spring at its other end is soeurvd to the inner surface of a second rupshnped disk 42 loosely mounted on tho shalt and held by the spring against the side of the lly wheel 43 fast on the shaft.

From this construction it will be seen that the spriin 41 constantly tends to separate the burs, lint because the 5 rings 31 are more powerful cannot do so on css the ram lever 35 is operated to force them back as previously described.

In order to limit the movement of the movable bur toward the fixed one I provide the lever 33 with a. set screw 44 which, by striking the back of the casing 23, will limit the movement of the shaft under the influence of the springs 31.

I realize that considerable variation is possible in the details of construction and arrangement of parts without do artini r from the spirit of m invention, and there ore do not intend to innit myself to the specific form shown and described.

i. In a grinding-mill, the combination with a 'iixed bur, of a longitudinally movable shaft. a bur fast on said shaft, an ond thrust 1 bearing for said shaft, 11 5 ring bearing on said end-thrust bearin ancl tending to hold said burs in contact, aiousing for said burs, a pivoted lever mounted between said endthrust bearing and said housing, and means contacting with said lever and housing to force the thrust bearing away from the housing and separate the bars.

2. In a grinding-mill, the combination. with a 'lixed bur, ot a longitudinally movable shaft, a bur fast on said shaft, an endthrust bearing for said shaft, 21. s ring hearing on said end-thrust hearing an tending to hold said bursin contact, a housing for said burs, a pivoted lover mounted between said endthrust bearing and said housing. a. cam-lever pivoted on the iirst mentioned lover and adapted to bear against said housing where by the end-thrust hearing may be moved away from said housing by the cam lover, and the huts separated.

3. In a grindinguuill, the combination with a tixed bur, of a longitudinally movahlo shaft, a bur last on said shaft, an end-thrust said end-thrust bearing}; an' tending to hold said inns in contact. a pair of collars loose on said shaft. a spring interposed between said collars. a part last on the shaft against lllt'll one of the collars abuts. a bearing for the shaft. against whit-h the other collar :Llltits. and means for positively moving' said endthrust bearing; longitudinally to permit said last mentioned spring to move the shaft lon- .;'ittulin.-a.lly and separate the burs.

4. In a grinding-mill, the combination with a iixed bur, of a longitudinally movable shaft, a bur fast on said shalt, an end-thrust bearing for said shalt, a spring bearing on said end-thrust bearing and tending to hold said burs in contact, a housing for said burs, a pivoted lever mounted between said endthrust bearing and said housing, means for moving said lever to positively force the endthrust bearing away from said housing and separate the burs, and a set screw adapted to limit the movement of the lever toward the housing.

.5. In a. grinding-mill, the combination with a fixed bur and a rotatable bur, of a housing for said burs, a feed hopper provided with a regulable o ening in its bottom, a. spout extending an or said opening and into is 6 housing, a pivot for the upper end of the spout, a coil spring on the pivot and boarin on the spout, and means for oscillating suit spout on its pivot.

In testimony whereof I ailix my signature in presence of two witnesses.

(.l'NNlNGllAM N. MCLAUGHLIN.

\Vitnesses:

Manna It. WnrrE, W. J. SMITH. 

